Modular core block construction

ABSTRACT

This invention improves on firearm frame manufacture by modularizing the frame into a frame and modular core block assembly providing ease of manufacture and servicing.

BACKGROUND

1. Field of Invention

This invention relates to firearms and the use of a modular core blockconstruction.

2. Description of the Related Art

Firearms with break-open frames have traditionally been manufactured asa single piece with complex machining of firing pin holes, relief's forsprings and action components necessary to hollow out a solid block orforging. The numerous setups to complete a frame reduce the weight froma 3 to 5 pound piece of steel down to less than 2 pounds. If any oneoperation is out of tolerance then the frame is ruined.

This invention improves on firearm frame manufacture and prior art bymodularizing the frame into a frame and a rebuild-able modular coreblock assembly. The modular core block assembly contains the core blockface, firing pins, firing pin springs and other components. As such themodular core block can be manufactured separately from the frame usingdifferent materials that optimize each part's strength and performance.It's size and shape simplifies the manufacturing process.

SUMMARY OF THE INVENTION

This invention improves on firearm frame manufacture by modularizing theframe into a frame and modular core block assembly. The modular coreblock assembly contains the firing pins, firing pin springs and othercomponents. It is manufactured separately from the frame and due to it'ssize and shape can be more easily made. Once assembled it slides intothe frame and is designed to withstand all pressures produced fromfiring the gun. If parts break within the module or wear out, the partsthat fail can be repaired without replacing the frame.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the frame and modular core blockconstruction.

FIG. 2 is an exploded view of the frame and modular core blockconstruction.

FIG. 3 is a cross sectional view of the modular core block assembly.

FIG. 4 is an exploded view of the modular core block assembly.

REFERENCE NUMERALS

-   1 Frame-   1A Frame relief for modular core block assembly-   2 Modular core block assembly-   2A Modular core block-   2B Modular core block face-   2C Firing pin transfer plate-   2D Firing pin transfer plate return spring-   2E Firing pin transfer plate pin-   2F Transfer pin-   2G Modular core block assembly screws-   2H Modular core block buttress-   2I Lever pocket-   2J Modular core block transfer plate pin hole-   2K Modular core block drift hole-   2L Modular core block relief for transfer plates & transfer pins

DETAILED DESCRIPTION OF THE INVENTION

This invention improves on firearm frame manufacture by modularizing theframe into a frame and modular core block assembly. The modular coreblock assembly contains the firing pins, firing pin springs and othercomponents. It is manufactured separately from the frame and due to it'ssize and shape can be more easily made. Once assembled it slides intothe frame and is designed to withstand all pressures produced fromfiring the gun. If parts break within the module or wear out, the partsthat fail can be repaired without replacing the frame.

FIG. 1 is a perspective view of the frame and modular core blockconstruction. The frame 1 is illustrated with the modular core blockassembly 2 in place in the firearm.

FIG. 2 is an exploded view of the frame and modular core blockconstruction. The frame 1 is illustrated with the modular core blockassembly 2 removed from the firearm. The Frame relief for modular coreblock assembly 1A is illustrated in this view and is a negative form ofthe modular core block assembly shape so that the assembly can slideinto the frame 1 and fasten in place. The modular core block face 2Bclamps onto the frame 1 and keeps it securely in place in the frame bysandwiching the frame relief for modular core block assembly 1A betweenthe modular core block face 2B and the modular core block buttress 2H.

FIG. 3 is a cross sectional view of the modular core block assembly thatillustrates how key parts of the assembly are positioned for use. Themodular core block assembly 2 is comprised of: modular core block 2A,modular core block face 2B that has holes for the firing pins to gothrough to ignite the primer in the shell when firing the gun, thefiring pin transfer plate 2C and the transfer pin 2F transfer the energyform the gun's hammers when firing the gun to ignite the shell's primersthereby firing the shell, the firing pin transfer plate return spring 2Dand firing pin transfer plate pin 2E allow the firing pin transfer plate2C to swing forward to ignite the shell and retract under spring forceafter firing the shell, and the modular core block assembly screws 2G.The lever pocket 2I that holds the firearm's lever that allows on toopen and lock close the firearm when unloading, loading and firing thegun.

FIG. 4 is an exploded view of the modular core block assembly provides amore detailed view of each part of the assembly. Components 2A through2I are the same as in FIG. 3 with a more detailed view of the firing pintransfer plate return spring 2D showing the torsion spring that bringsthe firing pin transfer plate pin 2C back to a neutral position afterthe gun is fired. The nature of the exploded view of the modular coreblock assembly provides a view of the modular core block transfer platepin hole 2J that holds the firing pin transfer plate pin 2E that thefiring pin transfer plate 2C rotates on. When servicing the gun, thefiring pin transfer plate pin 2E is removed by using a drift punchinserted through the modular core block drift hole 2K to drive the pinout. The modular core block relief for transfer plates & transfer pins2L that house the firing pin transfer plate 2C and transfer pin 2F. Themodular core block buttress 2H is shown clearly in this figure and wasexplained in the FIG. 2 narrative.

In summary the advantages of the modular core block construction are:ease of manufacture, easier servicing and repair or replacement of partsfor a longer life firearm.

1. A Modular Core Block Construction in firearms, comprising: a frame asa means for the barrel assembly to open and close and for the modularcore block assembly to attach to it, a modular core block assembly as ameans to contain necessary components to open, close, and fire saidfirearm, whereby said firearm can be manufactured and serviced easierand have parts repaired or replaced to extend said firearm's usefullife.